Device for building a colored marking strip in the surface of a concrete road



' A. T. GOLDBECK DEVICE FOR BUILDING A COLORED MARKING STRIP IN THESURFACE OF A CONCRETE ROAD Filed June 12, 1924 InVen to AttorneyPatented Jan. 13, 1925.

UNITED STATES ALBERT T. GOLDBECK, OF WASHINGTON,

DISTRICT OF COLUMBIA, DEDICATED, IBY

MESNE ASSIGNMENTS, TO THE CITIZENS OF THE UNITED STATES.

DEVICE FOR BUILDING A COLORED MARKING STRIP IN THE SURFACE OF AQO'NCRETE ROAD.

Application filed June 12, 1924. Serial No.'719,642.

(FILED UNDER THE ACT OF MARCH 3, 1883; 22 STAT. L. 625.)

To all whom it may concern Be it known that I, ALBERT T. GOLDBECK, acitizen of the United States of America, and an employee of the UnitedStates Department of Agriculture, residing in the city of Washington,District of Columbia, have invented an Improved Device for Building aColored Marking Strip in the Surface of a Concrete Road. z

This application is made under the act of March 3, 1883, chapter 143 (22Stat. 625) and the invention herein described and claimed may be used bythe Government of the United States or'any of its oflicers or employeesin the prosecution of work for the Government, or by any citizen of theUnited States, without payment to me of any royalty thereon.

It has been found that by marking a line on the center of a roadsurfacing it has the effect of keeping trafiic on the proper side of theroad thereby promoting safety particularly near the tops of hills and oncurves. In the past this marking has been produced by painting a line onthe road surface. In the use of the present device it is contemplatedthatthe marking will be built into and made an integral part of theconcrete surfacing.

The drawing consists of four figures, Figure 1 is a plan View of theinvention. Figure 2 is an end elevation, Figure 3 a partial sideelevation and Figure 4 a detail of one of the essential parts.

The device consists essentially of a wheel A which rolls on the concreteroad surface after the surface has been struck off and finished by theordinary hand or machine finishing methods. Wheel A is regulated inheight by hand-wheel B and as it rolls it produces an indented track inthe concrete road surface of any depth desired. Immediately following Ais hopper C containing helical screw'D and ending at bottom in spout Ehaving openin F whose size may be regulated. Immediately followinghopper C is finishing device G which may consist ofa roller operated bychain drive either with or against the direction of motion or heldstationary as desired. Wheel G may also be replaced by finishing floator belt if desired or used in combination with same. The

height of the finishing device is regulated by hand-Wheel W.

The above described apparatus is mounted on a platform H havingtransverse inverted channel sections I at front and back edges whichrest on I-beams J, the under sides of which are fastened to tubebearings K which hold axles L upon which flanged wheels M are mounted.These wheels run on the side forms N used in concrete road construction.As it is common practice to gradually increase the width of aconcreteroad on a horizontal curve and as it is desirable to keep the markingline or so-called traflic strip in the center of the road it has beennecessary to provide means for maintaining the above described equipmentwhich is mounted on the center line of the platform, immediately abovethe center line of the road, no matter what the width of the road mightbe, within limits of change in width ordinarily made.

This is accomplished as follows: When the road is of constant widthcatch 0 bears against collar P fastened to axle L thus holding thewheels M in a fixed lateral position with respect to the center line ofI-beam J. Four such catches, O, are provided, two on each side of themachine.

Attached to longitudinal frame member Q is lever R, the center of whichis fastened to platform H and the end of which is fastened to member Sby-1adjustable rod T. Platform H may thus be adjusted to the exactcenter of the road or to other positions if desired. In rounding acurve, catches O on one side of the device are placed in the releaseposition shown by dotted line, while the catches on the other side aremaintained in a locked position. As the side forms become wider apart,wheels M on one side of the machine move outward, axle L being capableof sliding in bearing K. In view of the lever attachment just describedplatform I-I moves laterally one-half of the lateral moveme'rrt't'akenby the wheels on one side of the machine and in this manner the centerof platform H'is maintained directly over the center-of the roadway. Asthe width of the road becomes narrower, springs V maintain the flangesof wheels M in constant contact with side forms N thus also maintainingcenter line of platform H over center line of road.

In practice the hopper'is filled with mortar preferably made of whitecement and sand. The operator turns crank U; this, through chain drivesoperates helical screw D, and at the same time, through chain drives toone of the wheels M slowly advances the entire machine. Wheel A indentsthe soft concrete road surfacing, which indentation ,is then filled withwhite mortar from spout E and finished to proper surface by finishingdevice G.

' I claimL 1 An apparatus for building a marking strip in the surface ofa concrete road, consisting of an adjustable-wheel for indenting thesurface of the roadway, a hopper and spout device for filling theindented surface with mortar, a roller for smoothing the filled surface,and a bridge which may be automatically spaced over any part of theroadway to support said Wheel, hopper and spout roller.

ALBERT T. GOLDBECK.

